Make only one screen landscape , others portal

1. Make project just allow portal

2. In AppDelegate.swift file: add 2 functions


func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
        if let rootViewController = self.topViewControllerWithRootViewController(rootViewController: window?.rootViewController) {
            if (rootViewController.responds(to: Selector(("canRotate")))) {
                // Unlock landscape view orientations for this view controller
                return .landscapeRight// .allButUpsideDown;
            }
        }
        
        // Only allow portrait (standard behaviour)
        return .portrait;
    }
    
    private func topViewControllerWithRootViewController(rootViewController: UIViewController!) -> UIViewController? {
        if (rootViewController == nil) { return nil }
        if (rootViewController.isKind(of: UITabBarController.self)) {
            return topViewControllerWithRootViewController(rootViewController: (rootViewController as! UITabBarController).selectedViewController)
        } else if (rootViewController.isKind(of: UINavigationController.self)) {
            return topViewControllerWithRootViewController(rootViewController: (rootViewController as! UINavigationController).visibleViewController)
        } else if (rootViewController.presentedViewController != nil) {
            return topViewControllerWithRootViewController(rootViewController: rootViewController.presentedViewController)
        }
        return rootViewController
    }



3. In controller file where you want to make Landscape , write a function canRotate:


@objc func canRotate() -> Void {}

and override viewWillDisappear method

override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        
        if (self.isMovingFromParent) {
            UIDevice.current.setValue(Int(UIInterfaceOrientation.portrait.rawValue), forKey: "orientation")
        }
        if delegate != nil{
            delegate!.setResultOfSignature(valueSent: image )
        }
        

    }



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